Influence of interfaces on the mechanical behavior of SiC particulate-reinforced Al–Zn–Mg–Cu composites

In particulate-reinforced metal matrix composites (MMCs), geometrically necessary dislocations (GNDs) form in the vicinity of reinforcement/matrix interfaces. In this study, the hardness distribution across the interface was studied using nanoindentation with high spatial resolution, for composites...

Full description

Saved in:
Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2015-09, Vol.644, p.79-84
Main Authors: Song, Jingya, Guo, Qiang, Ouyang, Qiubao, Su, Yishi, Zhang, Jie, Lavernia, Enrique J., Schoenung, Julie M., Zhang, Di
Format: Article
Language:English
Subjects:
Aging
COMPOSITES
Dislocation distribution
Dislocations
FAILURE
Interface structure
INTERFACES
MECHANICAL PROPERTIES
Metal matrix composites
Nanoindentation
Particulate composites
PARTICULATES
PROPERTIES
REINFORCEMENT
Silicon carbide
Strength
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In particulate-reinforced metal matrix composites (MMCs), geometrically necessary dislocations (GNDs) form in the vicinity of reinforcement/matrix interfaces. In this study, the hardness distribution across the interface was studied using nanoindentation with high spatial resolution, for composites treated under different aging conditions. The size of the GND punched zone, as determined from the hardness measurement, was found to be in agreement with that estimated by transmission electron microscopy (TEM). Mechanical characterization of bulk composites revealed a reduction in failure strain with decreasing punched zone size, while the strength of the composites was found to depend more on the intrinsic strength of the matrix alloy. These observations were interpreted in terms of the load transfer capacity between the matrix and reinforcement through the interface.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2015.07.050